Mechanisms of strengthening and fracture in composite materials second progress report, dec. 1, 1964 - may 31, 1965

Mechanisms of strengthening and fracture in composite material

Mechanisms of Strengthening and Fracture in Composite Materials Fifth Progress Report, Jun. 1 - Nov. 30, 1966

Strengthening and fracture mechanisms in composite material

Mechanisms of strengthening and fracture in composite materials Progress report, 1 Dec. 1966 - 1 Jun. 1967

Strengthening and fracture mechanisms in composite material

The effect of microstructure on the cleavage strength of quenched and tempered steels

Effects of particle size, distribution, and volume fraction on microscopic cleavage fracture strength of quenched and tempered steel

Mechanisms of strengthening and fracture in composite materials Progress report no. 4, Dec. 1, 1965 - Jun. 1, 1966

Mechanisms of strengthening and fracture in various composite material

Mechanisms of strengthening and fracture in composite materials Third progress report, 1 Jun. - 30 Nov. 1965

Mechanism of strengthening and fracture in composite materials - tensile strength, impact deformation, brittleness

The burial of Canon J.A. Calata and the revival of mass-based opposition in Cradock, South Africa, 1983

African Studies Seminar series. Paper presented 17 August 1998The funeral took place on a chilly afternoon in late June 1983, in the tiny rural Eastern Cape town of Cradock. The mourners, some five thousand of them, stood in cutting, dusty, dry wind, in the public square of Cradock's dilapidated African township, a township ironically called Lingelihle, or "good effort" in isiXhosa. The eulogies for the great man began to roll forth: shepherd of his people; an African Moses; a committed Christian; a skilled and tireless politician; a man to be cherished for the ages

Hubbard Models as Fusion Products of Free Fermions

A class of recently introduced su(n) `free-fermion' models has recently been used to construct generalized Hubbard models. I derive an algebra defining the `free-fermion' models and give new classes of solutions. I then introduce a conjugation matrix and give a new and simple proof of the corresponding decorated Yang-Baxter equation. This provides the algebraic tools required to couple in an integrable way two copies of free-fermion models. Complete integrability of the resulting Hubbard-like models is shown by exhibiting their L and R matrices. Local symmetries of the models are discussed. The diagonalization of the free-fermion models is carried out using the algebraic Bethe Ansatz.Comment: 14 pages, LaTeX. Minor modification

New symmetries of the chiral Potts model

In this paper a hithertho unknown symmetry of the three-state chiral Potts model is found consisting of two coupled Temperley-Lieb algebras. From these we can construct new superintegrable models. One realisation is in terms of a staggered isotropic XY spin chain. Further we investigate the importance of the algebra for the existence of mutually commuting charges. This leads us to a natural generalisation of the boost-operator, which generates the charges.Comment: 19 pages, improved notation, made the text easier to read, corrected some typo